/*
 * Alloy Analyzer
 * Copyright (c) 2002 Massachusetts Institute of Technology
 *
 * The Alloy Analyzer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * The Alloy Analyzer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the Alloy Analyzer; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package alloy.api;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Tuple {

    private List _atoms = new ArrayList();

    public Tuple() {
    }

    public void add(Atom a) {
        _atoms.add(a);
    }    

    public Iterator atoms() {
        return _atoms.iterator();
    }
    
    public int arity() {
    	return _atoms.size();
    }

    public String toString() {
        String result = "";
        for (Iterator iter = _atoms.iterator(); iter.hasNext();) {
            Atom atom = (Atom)iter.next();
            result = result + atom.toString() + " ";
        }
        return result;
    }

}
